Could Robert Pattinson be making his US TV show debut this Sunday? Rumour has it that the Twilight actor will be making a guest appearance in the hit TV show Entourage.

MTV News has reported that the actor is rumoured to be appearing in the season finale, as agent Ari Gold's most difficult celebrity client to date.

The news has not been confirmed by the show's network, HBO who usually make a big deal out of the guest stars they've managed to secure.

In fact, both Eminem and Christina Aguilera have already been confirmed for Sunday's show, so is Rob's participation just hot air?

Will you be tuning in anyway, just in case?!

Rob's had quite some year...